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5 Cards in this Set

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computed tomography of the brain (CT scan)
process that includes the use of a computer to produce a series of images of the tissues of the brain at any desired depth. The procedure is noninvasive, painless, and particularly useful in diagnosing brain tumors.
magnetic resonance imaging of the brain (MRI scan)
a noninvasive technique that produces cross-sectional and sagittal images of soft tissues of the brain by magnetic waves. Unlike CT scan, MRI produces images without use of radiation. It is used to visualize tumors, edema, multiple sclerosis, and herniated disks.
positron emission tomography of the brain (PET scan)
an imaging technique with a radioactive substance that permits viewing a slice of the brain to examine blood flow and metabolic activity. Images are projected on a viewing screen.
evoked potential studies (EP studies)
a group of diagnostic tests that measure changes and responses in brain waves elicited by visual, auditory, or somatosensory, stimuli. Visual evoked response (VER) is a response to visual stimuli. Auditory evoked response (AER) is a response to auditory stimuli.
lumbar puncture (LP)
insertion of a needle into the subarachnoid space usually between the third and fourth lumbar vertebrae. It is performed for many reasons, including the removal of cerebrospinal fluid for diagnostic purposes.